查询词典 carboxylic

One class is CAAX-mimetic compounds with an imidazolyl residue on one end and a carboxylic group on the other connected by benzodiazepine scaffold at different positions.

连有咪唑基的苯并二氮杂草化合物，以苯并二氮杂草-2-酮为分子骨架，7位连接含有咪唑基的侧链，1位或3位连接含羧基或酯基的侧链。此类化合物模拟了CAAX配体。

Thus,α,β-unsaturated ketones were prepared by base-catalized aldol condensation between substituted arylaldehydes and acetones. Using iodosobenzene diacetate as oxidants, the resulting α,β-unsaturated ketones will be transformed to β,γ-unsaturated carboxylic acid esters.

以不同取代的芳香醛跟丙酮缩合后可以得到α，β-不饱和酮，再用iodosobenzene diacetate做氧化剂氧化，可以成左卤o到β，γ-不饱和碳酸酯类化合物。

Although the peptides had different structures, they typically shared a handful of chemical features, such as phyenyl, hydroxyl, carboxylic acid, and isobutyl groups.

虽然说肽类具有不同的结构，但是他们都共同具有一些简单的化学特征，比如苯酰基，羟基，羧基以及异丁基团。

Ugi-4CC(four-component condensation) reaction is one of isonitrile-based MCR＇s(multi-component reactions), which is started with an amine, an aldehyde, a carboxylic acid and an isocyanide, after one-potreaction to produce a compound composed of the whole four starting materials.

Ugi-4CC四组份缩合反应是基于异腈的MCR＇s之中一类，它以异腈、羧酸、醛、胺为原料，可经一罐反应缩合生成由四种起始物共同组成的产物。

The infrared test indicates: all the saponins absorbing waves are similar, they contain functional groups such as aliphatic hydrocarbons, primary aliphatic alcohols and secondary aliphatic alcohols(Aliphatic carboxylic acids in sample 1 and 2) estimated by basic analyzed chart. They may contain long carbon chain with hydroxy, isomaltose and galactose estimated by particular analyzed chart.

红外吸收表明：皂甙组分的波形都非常相近，经过基础图谱分析可以发现皂甙中含有脂肪烃、脂肪族伯醇、脂肪族仲醇等官能团，样品1与2还含有脂肪酸官能团，经详细图谱检索，说明皂甙含有带羟基的长碳链、异麦芽糖和β-D-半乳糖。

The corrosion inhibition of isoquinoline and its hyd roxy and carboxylic derivates were determined by electrochemical methods,and qua ntum chemistry calculation were gained through HMO and CNDO.

用电化学方法实测了异喹啉及羟基、羧基两类取代衍生物的缓蚀效率，并用HMO、CNDO方法进行量子化学计算。

Lipoic acid is an essential coenzyme in the oxidative decarb-boxylation of α-keto carboxylic acids.

α-硫辛酸作为一种辅酶，在α-酮酸的氧化脱羧过程中起重要作用。

It is shown that the of the porous carbon towards (I_2) depends on the pore volume of the porous carbon; the adsorption of the porous carbon towards phenolic compounds depends on the density of carboxylic and lactonic groups on the surface of the porous carbon; the adsorption of the porous carbon towards Cr d...

发现多孔炭对酚类化合物及Cr的吸附以化学吸附为主，其中对酚类化合物的吸附由羧基与内酯基的表面密度合量决定，对Cr的吸附由表面官能团中羧基和内脂基含量的合量决定；多孔炭对I2的吸附以物理吸附为主，由孔容决定。

Moreover, Oxygen-containing groups such as methoxyl, carbohydrates, carboxylic/carbonyl, were also very different among four HAs

另外不同腐殖酸之间，含氧结构单元如甲氧基、碳水化合物结构、羧酸/羰基官能团等的含量也明显不同。

The method is characterized in that:(1) the reflux of the 2-[N, N- 2amino]-3-cyano-group-4-thiopheneacetic-5-carboxylic acid tetra ester is carried out in the proper sodium hydroxide aqueous solution of alcohol for 5h to 6h and the pH value is kept over 10 during hydrolysis;(2) the ethanol of 20 per cent to 60 per cent is added and then the strontium chloride aqueous solution with 2times to 2.5times molal weight is directly added, precipitates the crystal, is filtered and dried;(3) water is added to carry out the reflux and the little salt packed in the crude product is removed, and the product is collected through heat filtration.

其特征在于：①将2--3-氰基-4-羧甲基噻吩-5-羧酸四酯在适量氢氧化钠水醇溶液中回流5～6小时，水解过程保持pH值10以上；②然后再加入20-60％乙醇，随后直接加入2-2.5倍摩尔量氯化锶水溶液，析出结晶，过滤，晾干；③加水回流，除去粗品中包裹少量盐，热过滤，收集产品。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。